Sometimes used as an alternative to a tail wheel, used on tail-dragger style landing gear as usually a metal rod that creates friction with the ground while taxing. They are usually not steerable but provide straighter tracking while taxing or takeoff.

So you're out at the field where you've sustained a little damage or just broken a former from a really hard blender. Why drive to the local hobby shop when you can just walk over to the Thrift store (dumpster) and get yourself the perfect piece of second hand light ply. Who cares if its still part of a severed wing?!

This the spring found on nitro vehicles that runs from the carb throttle arm to a fixed location on the chassis or engine. This is a type of failsafe made to return the throttle to idle on nitro vehicles in the event that the throttle linkage was to come loose from the servo. It is not meant to keep the vehicle from running away in the case of signal losses though.

A tip stall occurs when the very tip of one wing fails to sustain lift, causing the airplane to roll in the direction of the stalled wing. Tip stalls usually occur on landing approaches or very low speeds.

The toe angle of a car is the angle of the tires from 0 degrees when viewing the car or truck from above. A "toe in" refers to wheels that are angled slightly in when the steering mechanism is neutral. Slight toe angles provide stability, but too much creates friction and is inefficient. Toe-out on front wheels provides more responsive steering but less stability. Toe-in on rear wheels provide stability and most cars are manufacturered that way.

The moment of a force; the measure of a force's tendency to produce torsion and rotation about an axis, equal to the vector product of the radius vector from the axis of rotation to the point of application of the force and the force vector.

Aircraft sits in the air, pointing vertically. Using the power of the engine the aircraft is "hovered". Utilising the torque of the engine (with help from the ailerons sometimes) the model rotates clockwise around its axis.

Lots of movement and power are needed to perform this maneuver, but the results are very impressive.

Torsen is short for "torque sensing" and is purely a mechanical device. A TORSEN has worm gears which rotate in one direction. If you try to input a torque on the output gear it will lock up. That is the "trick" in the Torsen.

It is a controlled balance between loose (oversteer) and push (understeer). As you enter a turn you get off the throttle a little bit because your car will push into the turn. When you get off the throttle this allows the front tires to bite better. Then the rear end gets a little loose and wants to swing out. So this is where you "throttle steer". You brip the throttle to get the correct balance between loose and push generally kepping the car a little loose so you can do "trailing throttle oversteer" with control. This is the fastest way around the turn.

A cord connecting a primary to a secondary transmitter. Used primarily for instructor/student flights. An instructor can hold a switch to pass control of an aircraft to the student pilot. Upon releasing the switch, the instructor's transmitter resumes control.

The extra lift that occurs as a helicopter starts transitions from hover to, especially forward, flight. The lift increases because the main rotor efficiency improves as it begins to cut into relatively undisturbed air.

Verb - The act of making car tires perfectly round, or as close to perfectly round as possible: "to true a tire."

Adjective - A tire that is perfectly round: "a true tire."

Most tires are not perfectly round, due to a high spot on the tire. This condition is refered to as out-of-round. By gently shaving the high spot off of the tire -- to true the tire -- the out-of-roundness is corrected.